“I think justice served will be a good start for our family to recover from this tragedy.”

Colleen Harris initially claimed in trial her husband may have committed suicide.

Shen later said in court that he died in a horrible accident as the couple grappled over a 12-gauge shotgun and that her husband’s death was a horrible event shrouded by the “grey fog” of traumatic memory loss.

Bob Harris, referred to by the defence lawyer as ‘Mr Everything’, was a US Forest Service supervisor and volunteer executive director of the Tahoe Baikal Institute, a group dedicated to protecting two deep blue-water lakes. He regularly travelled to Mongolia and Russia.

He had started an affair with a 34-year-old teacher and doctoral student he met while doing environmental work in Mongolia.

Colleen Harris told police that she discovered the affair in September 2012.

“He found this young girl in Mongolia, 34 years old, who made him feel like he was God,” she said in a videotaped interview.

“I didn’t know that it had been going on for a year. Stupid me.”

“I emailed my husband,” she told detectives. “I told him I was just devastated. I told him, ‘I’ve had time to think about this. I know I love you ... I know we can work this out.’”

Bob Harris was shot at close range from just beneath his left ear, leaving a gruesome exit wound on his face.

El Dorado County Deputy District Attorney Joe Alexander portrayed her as a calculated killer based on her actions after the shooting.

Crime scene investigators testified that Colleen Harris used Windex to clean blood spatter off the ceiling above the master bed after the killing.

Mobile phone records then showed that she left and drove to San Francisco, dumping her husband’s mobile phone, pistol and his treasured coin collection at a son’s house.

She clamly called roadside assistance on the way back after her car spun out and stalled. In another call, she laughed as she told the dispatcher she got the car started again and was on her way.

Then she called her lawyer before ditching her phone.

Met by police outside the house when she returned, she told an officer that she recalled he had a ‘bloody nose’.

She added wrapping a quilted blanket over Bob Harris to stop his getting cold. Otherwise, whatever happened was a “grey fog.”

When Colleen Harris was found guilty of first-degree murder — which provides for a maximum 50 years in jail, she dropped her head and put her hand over her face and began crying as she was led out of the courtroom.